I have got tinyMCE working in the django admin, but all the popups are blank (eg. edit HTML, add image)
The paths to the popup html pages all exist in the right plac
Check your MEDIA_URL in your settings file. If this is set to a non-relative path, i.e. http://site.com/media_url as Django recommends, tiny_mce will popup blank pages. Set this to a relative path and it should work.
See http://pageworthy.com/blog/2009/mar/09/tiny_mce-blank-popups/ for more details.